Female human 204 female 199 Male 196 Adolescent 194 male 177 Humans 171 adolescent 167 article 162 Adult 159 adult 155 Child 107 controlled study 105 priority journal 96 child 91 Middle Aged 85 Argentina 76 Child, Preschool 64 major clinical study 63 aged 53 Young Adult 52 Aged 51 clinical article 46 Infant 43 middle aged 35 preschool child 34 Human 33 infant 31 Support, Non-U.S. Gov't 27 newborn 27